/*
 * Copyright 2010 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package de.google.android.apps.iosched.io;

import static org.xmlpull.v1.XmlPullParser.END_DOCUMENT;
import static org.xmlpull.v1.XmlPullParser.END_TAG;
import static org.xmlpull.v1.XmlPullParser.START_TAG;
import static org.xmlpull.v1.XmlPullParser.TEXT;

import de.google.android.apps.iosched.provider.ScheduleContract;
import de.google.android.apps.iosched.provider.ScheduleContract.SearchSuggest;
import de.google.android.apps.iosched.util.Lists;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

import android.app.SearchManager;
import android.content.ContentProviderOperation;
import android.content.ContentResolver;

import java.io.IOException;
import java.util.ArrayList;

public class LocalSearchSuggestHandler extends XmlHandler
{
	public LocalSearchSuggestHandler()
	{
		super(ScheduleContract.CONTENT_AUTHORITY);
	}

	@Override
	public ArrayList<ContentProviderOperation> parse(XmlPullParser parser, ContentResolver resolver)
			throws XmlPullParserException, IOException
	{
		final ArrayList<ContentProviderOperation> batch = Lists.newArrayList();

		// Clear any existing suggestion words
		batch.add(ContentProviderOperation.newDelete(SearchSuggest.CONTENT_URI).build());
		String tag = null;
		int type;
		
		while ((type = parser.next()) != END_DOCUMENT)
		{
			if (type == START_TAG)
			{
				tag = parser.getName();
			}
			else if (type == END_TAG)
			{
				tag = null;
			}
			else if (type == TEXT)
			{
				final String text = parser.getText();
				
				if (Tags.WORD.equals(tag))
				{
					// Insert word as search suggestion
					batch.add(ContentProviderOperation.newInsert(SearchSuggest.CONTENT_URI)
							.withValue(SearchManager.SUGGEST_COLUMN_TEXT_1, text).build());
				}
			}
		}

		return batch;
	}

	private interface Tags
	{
		String WORD = "word";
	}
}
